derivate vs proximate

derivate

noun
  • Something derived; a derivative. 

adj
  • Derived; derivative. 

proximate

noun
  • A grammatical marker that distinguishes a relatively salient referent in a given context from a relatively non-salient (obviative) one. 

adj
  • Close or closest; adjacent. 

  • Immediately preceding or following in a chain of causation. 

  • About to take place; impending. 

How often have the words derivate and proximate occurred in a corpus of books? (source: Google Ngram Viewer )